Description
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix data corruption in dsync block recovery for small block sizes The helper function nilfs_recovery_copy_block() of nilfs_recovery_dsync_blocks(), which recovers data from logs created by data sync writes during a mount after an unclean shutdown, incorrectly calculates the on-page offset when copying repair data to the file's page cache. In environments where the block size is smaller than the page size, this flaw can cause data corruption and leak uninitialized memory bytes during the recovery process. Fix these issues by correcting this byte offset calculation on the page.
Affected products
linux: linux kernel; debian: debian linux
References10
- git.kernel.org/stable/c/120f7fa2008e3bd8b7680b4ab5df942decf60fd5 Patch
- git.kernel.org/stable/c/2000016bab499074e6248ea85aeea7dd762355d9 Patch
- git.kernel.org/stable/c/2e1480538ef60bfee5473dfe02b1ecbaf1a4aa0d Patch
- git.kernel.org/stable/c/364a66be2abdcd4fd426ffa44d9b8f40aafb3caa Patch
- git.kernel.org/stable/c/5278c3eb6bf5896417572b52adb6be9d26e92f65 Patch
- git.kernel.org/stable/c/67b8bcbaed4777871bb0dcc888fb02a614a98ab1 Patch
- git.kernel.org/stable/c/9c9c68d64fd3284f7097ed6ae057c8441f39fcd3 Patch
- git.kernel.org/stable/c/a6efe6dbaaf504f5b3f8a5c3f711fe54e7dda0ba Patch
- git.kernel.org/stable/c/120f7fa2008e3bd8b7680b4ab5df942decf60fd5 Patch
- git.kernel.org/stable/c/2000016bab499074e6248ea85aeea7dd762355d9 Patch
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 18 · as of 5 November 2026
- CWE
- CWE-787
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.